Hack-a-Shaq is a basketball defensive strategy used in the National Basketball Association (NBA) that involves committing intentional fouls (originally a clock management strategy) for the purpose of lowering opponents' scoring. The strategy was originally adapted by Dallas Mavericks coach Don Nelson, who directed players to commit personal fouls throughout the game against selected opponents who shot free throws poorly.
Nelson initially used the strategy against Dennis Rodman, a Hall of Fame power forward for the Detroit Pistons, San Antonio Spurs, and Chicago Bulls. However, the strategy acquired its name for Nelson's subsequent use of it against Hall of Fame center Shaquille O'Neal.

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